A multi-functional water treatment tank for bridges

Abstract

This utility model provides a multifunctional bridge water treatment tank, including a water distribution unit, a sedimentation and oil separation unit, an emergency tank, and a de-icing salt unit. The water distribution unit includes a distribution well and an inlet pipe. The distribution well has an inlet and a first flow hole connected to a first control valve. The sedimentation and oil separation unit includes a sedimentation and oil separation tank and an outlet pipe. The sedimentation and oil separation tank has an outlet and a second flow hole connected to a second control valve. The emergency tank has a recessed emergency drainage pump pit. The de-icing salt unit includes a de-icing brine tank. The water distribution well has a third flow hole connected to a third control valve. The de-icing brine tank has a recessed de-icing salt drainage pump pit. The entire structure is compact and occupies little space, yet it integrates bridge deck rainwater purification, emergency response to hazardous chemical transportation accidents, and bridge deck de-icing salt wastewater collection and treatment into one tank, serving three purposes in one. It is functionally comprehensive, saves land and money, and is convenient to manage and maintain.

Description

Technical Field

[0001] This utility model relates to the field of bridge drainage treatment technology, and in particular to a multifunctional water tank for bridge water treatment. Background Technology

[0002] In winter, low temperatures cause bridge surfaces to easily freeze. Maintenance units often use industrial salt to remove the ice, but the salty meltwater is discharged into water bodies through the bridge's rainwater collection system, damaging the habitats of aquatic plants and animals and causing them to die. Salt residue on the bridge surface corrodes concrete and steel reinforcement, shortening the bridge's lifespan and even causing safety accidents. Furthermore, icy bridge surfaces increase the risk of vehicle accidents, including those involving hazardous chemical transport vehicles. Hazardous chemical leaks can damage aquatic resources and habitats, threatening urban drinking water safety and raising widespread public concerns about safety. Therefore, bridges are a key area for highway traffic safety monitoring in winter.

[0003] Currently, bridges crossing sensitive water bodies are mostly equipped with emergency pools for hazardous chemical transport vehicles, which occupy space but only have a single function. They cannot simultaneously collect and harmlessly dispose of de-icing wastewater from the bridge surface, lacking multi-functionality. Adding additional pools would be costly and require a large area.

[0004] Therefore, it is necessary to propose a multifunctional water treatment tank for bridges to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main objective of this invention is to provide a multifunctional water treatment tank for bridges, in order to solve the problem that the existing bridge water treatment tanks have a simple structure and lack multifunctionality.

[0006] To achieve the above objectives, this utility model provides a multifunctional bridge water treatment tank, including a water distribution unit, a sedimentation and oil separation unit, an emergency tank, and a de-icing salt unit. The water distribution unit is disposed between the sedimentation and oil separation unit, the emergency tank, and the de-icing salt unit.

[0007] The water distribution unit includes a water distribution well and an inlet pipe. The water distribution well has an inlet on its side wall away from the emergency pool. One end of the inlet pipe is connected to the inlet, and the other end of the inlet pipe is used to connect to the bridge deck. The water distribution well has a first flow hole on its side wall near the emergency pool and is connected to a first control valve.

[0008] The settling and oil separation unit includes a settling and oil separation tank and a water outlet pipe. The settling and oil separation tank has a water outlet on its side wall away from the water distribution well. One end of the water outlet pipe is connected to the water outlet, and the other end of the water outlet pipe is used to connect to an external water body. The settling and oil separation tank has a second flow hole on its side wall near the water distribution well and is connected to a second control valve.

[0009] An emergency drainage pump pit is formed in the depression inside the emergency pool;

[0010] The de-icing salt unit includes a de-icing brine tank. A third flow hole is provided on the side wall of the water distribution well near the de-icing brine tank and a third control valve is connected to it. A de-icing salt drainage pump pit is formed in the recess of the de-icing brine tank.

[0011] Preferably, there are two water distribution units and two sand and oil separation units, with the two water distribution units arranged opposite each other on both sides of the emergency pool, and the two sand and oil separation units arranged opposite each other on both sides of the emergency pool.

[0012] Preferably, the inlet is located near the top of the water distribution well, the outlet is located near the top of the sedimentation tank, and the first flow hole, the second flow hole, and the third flow hole are all located near the bottom of the water distribution well.

[0013] Preferably, the de-icing salt unit further includes a filter plate, and a purification reuse pump pit is formed by a recess at one corner of the de-icing brine tank. The filter plate is bent and connected to the de-icing brine tank to protect the outside of the purification reuse pump pit. The filter plate itself has filter holes.

[0014] Preferably, the emergency pool has an overflow hole located on the side wall near the upper middle part of the de-icing brine pool.

[0015] Preferably, the bottom of the water distribution well is recessed to form a water inlet groove, the water inlet groove is bent, one end of the water inlet groove is located directly below the water inlet, and the other end of the water inlet groove is connected to the third flow hole.

[0016] Preferably, the sedimentation and oil separation unit further includes an oil separator plate, the bottom of the sedimentation and oil separation tank is recessed to form a sand discharge pump pit, the top of the sedimentation and oil separation tank is provided with a hoisting port, and the oil separator plate is suspended and connected to the hoisting port to be set between the sand discharge pump pit and the water outlet.

[0017] Preferably, the bottom of the water distribution well is recessed to form a water distribution pump pit.

[0018] Preferably, the top of the emergency pool has an emergency pool manhole directly above the emergency drain pump pit, the top of the de-icing brine pool has a de-icing brine pool manhole directly above the de-icing brine drain pump pit, the top of the water distribution well has a water distribution well manhole directly above the water distribution pump pit, and the top of the sedimentation and grease trap has a sedimentation and grease trap manhole directly above the sand discharge pump pit.

[0019] Preferably, the inner walls of the emergency pool and the de-icing brine pool are coated with an anti-corrosion layer.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This utility model provides a multifunctional bridge water treatment tank, including a water distribution unit, a sedimentation and oil separation unit, an emergency tank, and a de-icing salt unit. The water distribution unit includes a water distribution well and an inlet pipe. An inlet is located on the side wall of the water distribution well away from the emergency tank. One end of the inlet pipe is connected to the inlet, and the other end is connected to the bridge deck. A first flow passage is located on the side wall of the water distribution well near the emergency tank, and a first control valve is connected to it. The sedimentation and oil separation unit includes a sedimentation and oil separation tank and an outlet pipe. An outlet is located on the side wall of the pool away from the distribution well. One end of the outlet pipe is connected to the outlet, and the other end is used to connect to an external water body. A second flow hole is located on the side wall of the sedimentation and grease trap near the distribution well, and a second control valve is connected to it. An emergency drain pump pit is formed in the recessed area of ​​the emergency pool. The de-icing salt unit includes a de-icing brine pool. A third flow hole is located on the side wall of the distribution well near the de-icing brine pool, and a third control valve is connected to it. A de-icing brine drain pump pit is formed in the recessed area of ​​the de-icing brine pool. The entire structure is compact and occupies little space, but it integrates bridge deck rainwater purification, emergency response to hazardous chemical transportation accidents, and bridge deck de-icing salt wastewater collection and treatment into one unit. It serves three purposes in one pool, has comprehensive functionality, saves land and money, and is relatively convenient to manage and maintain. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a plan view of the overall structure in one embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0025] Figure 3 for Figure 1 A cross-sectional view along the BB direction;

[0026] Figure 4 for Figure 1 A cross-sectional view along the CC direction;

[0027] Figure 5 for Figure 1 A cross-sectional view along the DD direction;

[0028] Figure 6 for Figure 1 A cross-sectional view along the EE direction;

[0029] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] Explanation of icon numbers:

[0031] 10. Water distribution unit; 110. Water distribution well; 111. Water inlet; 112. First flow passage; 113. First control valve; 114. Second flow passage; 115. Second control valve; 116. Third flow passage; 117. Third control valve; 120. Water inlet pipe; 130. Water inlet trough; 140. Water distribution pump pit; 150. Water distribution well manhole; 20. Sand and oil separator unit; 210. Sand and oil separator tank; 211. Water outlet. 220, Water outlet pipe; 230, Oil separator plate; 240, Sand discharge pump pit; 250, Lifting port; 260, Manhole for sand and oil separator; 30, Emergency pool; 310, Emergency drain pump pit; 320, Overflow hole; 330, Emergency pool manhole; 40, De-icing salt unit; 410, De-icing brine pool; 420, De-icing salt drain pump pit; 430, Filter plate; 440, Purified reuse pump pit; 450, De-icing brine pool manhole. Detailed Implementation

[0032] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0036] Please see the appendix Figure 1-6 A multifunctional bridge water treatment tank according to one embodiment of the present invention includes a water distribution unit 10, a sedimentation and oil separation unit 20, an emergency tank 30, and a de-icing salt unit 40. The water distribution unit 10 is disposed between the sedimentation and oil separation unit 20, the emergency tank 30, and the de-icing salt unit 40, and the specific scheme is as follows:

[0037] The water distribution unit 10 includes a water distribution well 110 and an inlet pipe 120. The water distribution well 110 has an inlet 111 on its side wall away from the emergency pool 30. One end of the inlet pipe 120 is connected to the inlet 111, and the other end is connected to the bridge deck. The water distribution well 110 has a first flow passage 112 on its side wall near the emergency pool 30, and a corresponding first control valve 113 is connected to it. The sand and oil separation unit 20 includes a sand and oil separation tank 210 and an outlet pipe 220. The sand and oil separation tank 210 has an outlet 211 on its side wall away from the water distribution well 110. One end of the water pipe 220 is connected to the outlet 211, and the other end of the outlet pipe 220 is used to connect to an external water body. The sedimentation and oil separation tank 210 has a second flow hole 114 on the side wall near the water distribution well 110 and is connected to a second control valve 115. An emergency drain pump pit 310 is formed in the recess of the emergency pool 30. The de-icing salt unit 40 includes a de-icing brine pool 410. A third flow hole 116 is opened on the side wall near the de-icing brine pool 410 and is connected to a third control valve 117. A de-icing brine drain pump pit 420 is formed in the recess of the de-icing brine pool 410.

[0038] Specifically, the multi-functional bridge water treatment tank in this application includes a water distribution unit 10, a sedimentation and oil separation unit 20, an emergency tank 30, and a de-icing salt unit 40. The water distribution unit 10 is used to receive bridge deck water, which is then distributed to other units and tanks for different water treatments as needed. It includes a distribution well 110 and an inlet pipe 120. The distribution well 110 serves as the main water storage chamber, while the inlet pipe 120 is used to receive bridge deck water. Bridge deck water flows in through an inlet 111 opened on the side wall of the distribution well 110. Therefore, the inlet pipe 120 is connected to the inlet 111, and the other end is connected to the outlet of the bridge deck to achieve the function of diversion. The sedimentation and oil separation unit 20 is used to treat the sand and oil carried by the rainwater flowing into the bridge deck, so that it is purified before being discharged into the external water body to avoid polluting the external water body. It includes a sedimentation and oil separation tank 21. The settling and oil separator 210 serves as a chamber for settling and oil separation, while the outlet pipe 220 is used to discharge purified water. Bridge surface water is discharged through the outlet 211 opened on the side wall of the settling and oil separator 210. Therefore, the outlet pipe 220 is connected to the outlet 211, and the other end is connected to the external water body to guide the water to flow into the external water body. It can be understood that a second flow hole 114 is opened on the side wall of the settling and oil separator 210 near the water distribution well 110. The second flow hole 114 is a water flow channel for water in the water distribution well 110 to flow into the settling and oil separator 210 for purification treatment. A second control valve 115 is added to control the opening and closing of the second flow hole 114, so that it can be opened (other control valves are closed) in non-hazardous chemical transport vehicle accidents and non-ice melting conditions to carry out rainwater purification treatment.

[0039] The emergency pool 30 is used to centrally store toxic wastewater in the event of an accident involving a hazardous chemical transport vehicle (excluding de-icing conditions) to prevent leakage into natural water bodies or soil. Therefore, an emergency drain pump pit 310 is recessed within the emergency pool 30. This pit stores the toxic wastewater from the hazardous chemical accident. When a specialized transfer tanker arrives at the scene, a drain pump extends into the emergency drain pump pit 310 to pump the toxic wastewater from the emergency pool 30 into the transfer tanker, which is then transported to a specialized treatment site for harmless treatment. The distribution well 110 has a first flow hole 112 on its side wall near the emergency pool 30. The first flow hole 112 is a water flow channel for water from the distribution well 110 to flow into the emergency pool 30 for classification and treatment. A first control valve 113 is also provided to control the opening and closing of the first flow hole 112. In the event of an accident involving a hazardous chemical transport vehicle during rainy weather, the valve is opened (other control valves are closed) to guide rainwater carrying toxic substances into the emergency pool 30 for storage, awaiting subsequent harmless treatment.

[0040] Furthermore, the de-icing salt unit 40 is used to store saline de-icing wastewater under non-hazardous chemical accidents and de-icing conditions for subsequent water treatment. It includes a de-icing brine tank 410 as a chamber for storing saline de-icing wastewater. Therefore, a third flow hole 116 needs to be opened on the side wall of the water distribution well 110 near the de-icing brine tank 410. The third flow hole 116 is a water flow channel for water in the water distribution well 110 to flow into the de-icing brine tank 410 for storage and treatment. A third control valve 117 is added to control the opening and closing of the third flow hole 116 (other control valves are closed), so that it is opened under de-icing conditions to ensure that saline de-icing wastewater flows into the de-icing brine tank 410.

[0041] In a preferred embodiment of this utility model, there are two water distribution units 10 and two sand and oil separation units 20, with the two water distribution units 10 arranged opposite each other on both sides of the emergency pool 30, and the two sand and oil separation units 20 arranged opposite each other on both sides of the emergency pool 30.

[0042] It should be noted that such a water distribution unit 10 and a sedimentation and oil separation unit 20 are set as a group, which is set on one side of the emergency pool 30 to connect to the bridge deck water of the left bridge, and the other side is connected to the bridge deck water of the right bridge. The two sides are symmetrical so that they can share an emergency pool 30 and a de-icing brine pool 410, thereby reducing the footprint.

[0043] In a preferred embodiment of the present invention, the inlet 111 is located near the top of the distribution well 110, the outlet 211 is located near the top of the sedimentation tank 210, and the first flow hole 112, the second flow hole 114, and the third flow hole 116 are all located near the bottom of the distribution well 110.

[0044] It should be noted that the inlet 111 is positioned near the top to avoid liquid backflow due to being set too low. Since the mud and sand will settle to the bottom, the outlet 211 is positioned near the top to prioritize the discharge of the purified water from the upper layer. The first flow hole 112, the second flow hole 114, and the third flow hole 116 are all positioned close to the bottom of the distribution well 110 to maximize the emptying of the distribution well 110, facilitating the rapid flow of rainwater into the target unit pool. At the same time, the mud and sand in the rainwater naturally settle to the bottom and flow through the flow holes located at the bottom.

[0045] In a preferred embodiment of the present invention, the de-icing salt unit 40 further includes a filter plate 430. A purification and reuse pump pit 440 is formed by a recess at one corner of the de-icing brine tank 410. The filter plate 430 is bent and is connected to the de-icing brine tank 410 to protect the outside of the purification and reuse pump pit 440. The filter plate 430 itself has filter holes.

[0046] It is worth noting that the filter plate 430 is used to purify the saline de-icing wastewater stored in the de-icing brine tank 410. After filtration and purification, it can be recycled, reducing the pollution of surrounding water and soil by the de-icing salt. It has filter holes for water flow, and the interior is equipped with filter materials such as activated carbon. Therefore, a purification and reuse pump pit 440 is formed by a recess at one corner of the de-icing brine tank 410, which is used to collect the filtered and purified de-icing brine and then pump it out to a recycling transfer tanker. To ensure the filtration effect, the filter plate 430 is bent so that it can be installed outside the purification and reuse pump pit 440, so that the saline de-icing wastewater can be filtered before flowing into the purification and reuse pump pit 440. It is worth mentioning that the filter plate 430 can be prefabricated and assembled, which makes installation and processing convenient and improves efficiency.

[0047] In a preferred embodiment of this utility model, the emergency pool 30 is provided with an overflow hole 320 on the side wall near the middle and upper part of the de-icing brine pool 410.

[0048] It is worth noting that the overflow hole 320 is used to divert toxic wastewater exceeding the capacity of the emergency pool 30 to the de-icing brine pool 410 for temporary storage, so as to prevent the toxic wastewater from leaking directly into natural water bodies or seeping into the soil due to the overflow of the emergency pool 30, thereby connecting the emergency pool 30 and the de-icing brine resource pool to form a two-level emergency storage system.

[0049] Furthermore, the bottom of the water distribution well 110 is recessed to form a water inlet groove 130. The water inlet groove 130 is bent, with one end of the water inlet groove 130 corresponding to the water inlet 111 directly below it, and the other end of the water inlet groove 130 communicating with the third flow hole 116.

[0050] It should be noted that the inlet trough 130 can serve as a diversion channel during the ice-melting process. One end of it is positioned directly below the inlet 111 so that the saline ice-melting wastewater can fall directly into the inlet trough 130. The inlet trough 130 can be sloped to guide the saline ice-melting wastewater to the third flow hole 116 and into the de-icing brine pool 410, achieving a rapid guiding effect, shortening the residence time of the brine in the distribution well 110, reducing corrosion to other areas, and improving the service life of the distribution well 110.

[0051] Furthermore, the sedimentation and oil separation unit 20 also includes an oil separation plate 230, the bottom of the sedimentation and oil separation tank 210 is recessed to form a sand discharge pump pit 240, the top of the sedimentation and oil separation tank 210 is provided with a hoisting port 250, and the oil separation plate 230 is suspended and connected to the hoisting port 250 to be set between the sand discharge pump pit 240 and the water outlet 211.

[0052] It should be understood that the oil separator 230 isolates floating oil pollutants in rainwater, preventing them from flowing out through the outlet pipe 220 and affecting external water bodies. The oil separator 230 extends horizontally to the side walls of the sedimentation tank 210 to achieve complete blocking. The top of the oil separator 230 can be slightly higher than the outlet pipe 220 to prevent oil floating on the surface from entering the subsequent drainage pipes, while the bottom can be spaced apart from the bottom of the sedimentation tank 210 to form a flow gap, allowing rainwater to pass through. The sediment inside is concentrated in the sand discharge pump pit 240, to be pumped out later. The lifting port 250 facilitates the installation of the oil separator 230 and allows for manual removal for cleaning, oil removal, or replacement, ensuring the oil separator 230 maintains its high-efficiency interception capability over the long term.

[0053] Furthermore, a water distribution pump pit 140 is formed in the bottom depression of the water distribution well 110.

[0054] It should be noted that the water distribution pump pit 140 is used to pump out the residual water in the water distribution well 110 through the pump body: before each change of working condition, the water body remaining in the bottom plate of the water distribution well 110 from the previous working condition is drained to ensure that there are no impurities or pollution residues in the water distribution well 110, so as to provide a "clean environment" for the water distribution of the next working condition and avoid cross-contamination of water bodies of different properties.

[0055] Furthermore, an emergency pool manhole 330 is provided on the top of the emergency pool 30 directly above the emergency drain pump pit 310; a de-icing brine pool manhole 450 is provided on the top of the de-icing brine drain pump pit 420; a water distribution well manhole 150 is provided on the top of the water distribution pump pit 140; and a sand and oil separator manhole 260 is provided on the top of the sand discharge pump pit 240.

[0056] It should be noted that the emergency pool manhole 330 is located directly above the emergency drain pump pit 310 to facilitate the subsequent extraction of residual toxic wastewater, and also serves as the hoisting and installation port for the emergency pool 30 drain pump; the de-icing brine pool manhole 450 is located directly above the de-icing brine drain pump pit 420 to facilitate the subsequent extraction of residual salt-containing de-icing wastewater, and also serves as the hoisting and installation port for the de-icing brine pool 410 drain pump and a vent; the water distribution well manhole 150 is located directly above the water distribution pump pit 140 to facilitate the subsequent extraction of residual water, and also serves as the hoisting and installation port for the water distribution well 110 drain pump; the sand and oil separator manhole 260 is located directly above the sand discharge pump pit 240 to facilitate the subsequent extraction of water and sand, and also serves as the hoisting and installation port for the sand discharge pump.

[0057] Furthermore, the inner walls of the emergency pool 30 and the de-icing brine pool 410 are coated with an anti-corrosion layer.

[0058] Understandably, this can improve the salt corrosion resistance of reinforced concrete and the corrosion resistance of hazardous chemical waste liquids, respectively. The anti-corrosion layer can be made of epoxy resin or fiberglass cloth, etc.

[0059] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multifunctional water treatment tank for bridges, characterized in that, It includes a water distribution unit, a grit and oil separation unit, an emergency tank, and a de-icing salt unit, wherein the water distribution unit is located between the grit and oil separation unit, the emergency tank, and the de-icing salt unit; wherein, The water distribution unit includes a water distribution well and an inlet pipe. The water distribution well has an inlet on its side wall away from the emergency pool. One end of the inlet pipe is connected to the inlet, and the other end of the inlet pipe is used to connect to the bridge deck. The water distribution well has a first flow hole on its side wall near the emergency pool and is connected to a first control valve. The settling and oil separation unit includes a settling and oil separation tank and a water outlet pipe. The settling and oil separation tank has a water outlet on its side wall away from the water distribution well. One end of the water outlet pipe is connected to the water outlet, and the other end of the water outlet pipe is used to connect to an external water body. The settling and oil separation tank has a second flow hole on its side wall near the water distribution well and is connected to a second control valve. An emergency drainage pump pit is formed in the depression inside the emergency pool; The de-icing salt unit includes a de-icing brine tank. A third flow hole is provided on the side wall of the water distribution well near the de-icing brine tank and a third control valve is connected to it. A de-icing salt drainage pump pit is formed in the recess of the de-icing brine tank.

2. The multifunctional bridge water treatment tank according to claim 1, characterized in that, There are two water distribution units and two sand and oil separation units. The two water distribution units are arranged opposite each other on both sides of the emergency pool, and the two sand and oil separation units are arranged opposite each other on both sides of the emergency pool.

3. The multifunctional bridge water treatment tank according to claim 2, characterized in that, The inlet is located near the top of the water distribution well, the outlet is located near the top of the sedimentation and oil separation tank, and the first flow hole, the second flow hole, and the third flow hole are all located near the bottom of the water distribution well.

4. The multifunctional bridge water treatment tank according to claim 3, characterized in that, The de-icing salt unit also includes a filter plate. A purification and reuse pump pit is formed by a recess at one corner of the de-icing brine tank. The filter plate is bent and is connected to the de-icing brine tank to protect the outside of the purification and reuse pump pit. The filter plate itself has filter holes.

5. The multifunctional bridge water treatment tank according to claim 3, characterized in that, An overflow hole is provided on the side wall of the emergency pool near the upper middle part of the de-icing brine pool.

6. The multifunctional bridge water treatment tank according to claim 3, characterized in that, The bottom of the water distribution well is recessed to form a water inlet channel. The water inlet channel is bent, with one end of the water inlet channel located directly below the water inlet, and the other end of the water inlet channel connected to the third flow hole.

7. The multifunctional bridge water treatment tank according to claim 3, characterized in that, The sedimentation and oil separation unit also includes an oil separator plate. The bottom of the sedimentation and oil separation tank is recessed to form a sand discharge pump pit. The top of the sedimentation and oil separation tank is provided with a hoisting port. The oil separator plate is suspended and connected to the hoisting port to be placed between the sand discharge pump pit and the water outlet.

8. The multifunctional bridge water treatment tank according to claim 7, characterized in that, The bottom of the water distribution well is recessed to form a water distribution pump pit.

9. The multifunctional bridge water treatment tank according to claim 8, characterized in that, An emergency pool manhole is provided at the top of the emergency pool directly above the emergency drain pump pit; a de-icing brine pool manhole is provided at the top of the de-icing brine drain pump pit; a water distribution well manhole is provided at the top of the water distribution pump pit; and a sand and oil separator manhole is provided at the top of the sand discharge pump pit.

10. The multifunctional bridge water treatment tank according to claim 1, characterized in that, The inner walls of the emergency pool and the de-icing brine pool are coated with an anti-corrosion layer.

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